Marcus, Rudolph A. (1923–)
Rudolph Marcus was a Canadian-born US physical chemist who developed what is now known as the
Marcus theory for electron transfer (oxidation-reduction) reactions of solvent
molecules. His formula calculates the size of the energy barrier the electrons
must surmount to move from one molecule to another. The theory is applicable
to such processes as photosynthesis and the electrical conductivity of polymers. He was awarded the 1992 Nobel
Prize in Chemistry.